Period 4 GrammarTeaching aims 1．Students will be able to recognize the －ing/being done forms and know the exact meanings of them.2．Students will be able to use these two forms correctly.Teaching procedures Step 1 Revision Ask students to answer the following questions without referring to the textbook.1．What did Clancy witness when he ran down to the shore?2．Why did Clancy run in a hurry?3．What did Old Tom do when they headed into the bay?4．What did Old Tom do after George beat the water?5．What did Clancy witness when they drew near?Suggested answers：1．He saw a whale throwing itself out of the water and then crashing_down again.2．Because Clancy had already heard that George didn't like being_kept_waiting.3．They could see Old Tom swimming by the boat，showing them the way.4．Tom circled back to the boat，leading them to the hunt again.5．He could see a whale being_attacked by a pack of about six other killers.Next，ask students to pay attention to the underlined words and lead into the grammar item—“v.－ing”/ “being done”．Step 2 Grammar learning1．现在分词(－ing 形式)的构成。v．－ing 形式由 “do＋ing” 构成，其否定形式是 “not doing”，v.－ing 可以带宾语或状语构成 v．－ing 短语，没有人称和数的变化，但有时态和语态的变化。2．动词－ing 形式的被动式分一般式和完成式：(1) 一般式：表示这个被动的动作正在进行或与谓语表示的动作同时发生。(2) 完成式：强调这个被动的动作在谓语动词所表示的动作之前完成。 语态时态主动语态被动语态一般式(not)doing(not)being done完成式(not)having done(not)having been done 3.动词－ing 的被动式的句法功能。(1)作主语。如：So_being_killed_by_sharks was a common thing.(2)作宾语，用在介词后或需要带－ing 形式作宾语的动词后。如：George didn't like being_kept_waiting.He was terrified of being_abandoned_by_us.Do you remember_having_been_taken to...
